Implements support for functions with the same name, but different parameters

tests/integration/FunctionsTests.cpp

@@ -150,5 +150,33 @@ return
     delete script;
 }
 
+TEST_CASE( "Allow declaration of multiple functions with different signatures", "[integration]" ) {
+    Script* script = Script::Create(
+            R"(
+function add(number a, number b)
+    return a + b
+end
+
+function add(string a, string b)
+    return a + b
+end
+
+intResult = add(5, 500)
+stringResult = add('foo', 'bar')
+)"
+    );
+    REQUIRE(!script->Diagnostics -> HasErrors());
+    script->Evaluate();
+    auto intVar = script -> GetVariable(u"intResult");
+    REQUIRE(intVar != nullptr);
+    CHECK(intVar->EvaluateInteger() == 505);
+    auto stringVar = script -> GetVariable(u"stringResult");
+    REQUIRE(stringVar != nullptr);
+    CHECK(stringVar->EvaluateString() == u"foobar");
+
+
+    delete script;
+}
+
 
 #endif